scholarly journals Physical and Mechanical Characterization of Titica Vine (Heteropsis flexuosa) Incorporated Epoxy Matrix Composites

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4079
Author(s):  
Juliana dos Santos Carneiro da Cunha ◽  
Lucio Fabio Cassiano Nascimento ◽  
Fernanda Santos da Luz ◽  
Sergio Neves Monteiro ◽  
Maurício Ferrapontoff Lemos ◽  
...  
Keyword(s):  
Sodium Carbonate ◽  
Volume Fraction ◽  
Fracture Mechanisms ◽  
Matrix Composites ◽  
Sem Images ◽  
Chemical Treatments ◽  
Impact Tests ◽  
Izod Impact ◽  
First Time

Titica vine (Heteropsis flexuosa) is a typical plant of the Amazon region commonly used for making baskets, bags, brooms and furniture, owing to its stiff fibers. In spite of its interesting properties, there is so far no reported information regarding the use of titica vine fibers (TVFs) in engineering composite materials. In this work, the TVF and its epoxy composites were for the first time physically, thermally and mechanically characterized. Additionally, the effect of two kinds of chemical treatments, one with sodium carbonate and one with calcium lignosulfonate, as well as different volume fractions, 10, 20, 30 and 40 vol%, of TVF-reinforced composites were assessed for corresponding basic properties. The thermogravimetric results of the composites reveal enhanced thermal stability for higher TVF content. In addition, the composite incorporated with 40 vol% of TVFs treated with sodium carbonate absorbed 19% more water than the composites with untreated fibers. By contrast, the calcium lignosulfonate treatment decreased water absorption by 8%. The Charpy and Izod impact tests showed that the composites, incorporated with the highest investigated volume fraction (40 vol%) of TVF, significantly increased the absorbed energy by 18% and 28%, respectively, compared to neat epoxy. ANOVA and Tukey statistical analyses displayed no direct influence of the chemical treatments on the energy absorption of the composites for either impact tests. SEM images revealed the main fracture mechanisms responsible for the performance of TVF composites.

High Volume Fraction Aluminum /Alumina-Fused Silica Hybrid Particulate Metal Matrix Composite

2013 ◽  
Vol 701 ◽  
pp. 3-7
Author(s):  
Ghodratollah Roudini ◽  
Mehdi Asgharian ◽  
Morteza Khosravi
Keyword(s):  
Metal Matrix ◽  
Volume Fraction ◽  
High Volume ◽  
Optical Microscope ◽  
Fused Silica ◽  
High Volume Fraction ◽  
Matrix Composites ◽  
Sem Images ◽  
Composite Microstructure ◽  
Silica Hybrid

High volume fraction Aluminum/alumina-fused silica hybrid metal matrix composites containing alumina with 0, 10, 30 and 50 wt% fused silica were produced by melt squeezing casting method. Microstructure of hybrid composite was investigated by optical microscope and scanning electron microscopy (SEM). The SEM images showed uniform distribution of fused silica particles in composite microstructure. Also compressive strength of the composites changed (310-110 MPa) with amount of fused silica.

Izod Impact Tests in Polyester Matrix Composites Reinforced with Malva Fibers

2014 ◽  
pp. 415-423
Author(s):  
Jean Igor Margem ◽  
Frederico Muylaert Margem ◽  
Marina Rangel Margem ◽  
Vinícius Alves Gomes ◽  
Sergio N. Monteiro
Keyword(s):  
Matrix Composites ◽  
Impact Tests ◽  
Polyester Matrix ◽  
Izod Impact

scholarly journals Manufacture of Partially Biodegradable Composite Materials Based on PLA-Tires Powder: Process and Characterization

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Carlos Rolando Rios-Soberanis ◽  
Shuchi Wakayama ◽  
Takenobo Sakai ◽  
José de los Ángeles Rodriguez-Laviada ◽  
Emilio Pérez-Pacheco
Keyword(s):  
Volume Fraction ◽  
Research Work ◽  
Fracture Mechanisms ◽  
Infrared Analysis ◽  
Biodegradable Composite ◽  
Filler Volume Fraction ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis ◽  
Izod Impact ◽  
Solid Residuals

This research work focuses on the processability and mechanical characterization of blends of polylactic acid (PLA) and tire (elastomeric part). Wasted tires used as filler in the PLA matrix were reduced by two different processes (thermal shock and pyrolysis) in order to acquire the solid residuals in powder to be characterized and compared. Elastomeric solids obtained from scraped tires were used as filler in the PLA matrix and mixed in a Brabender 60 cc mixer at different concentrations ranging from 0% to 60% of filler volume fraction. The blend was laminated, and then samples were obtained in order to undertake mechanical properties at tension and Izod impact tests. A fully detailed analysis on the solid powders by Differential Scanning Calorimeter (DSC), thermogravimetric analysis (TGA), infrared analysis (IR), and scanning electron microscopy analysis (SEM) identified them as a rich source of carbon. Blends were characterized thermally and mechanically showing a direct effect due to the tire nature (thermoset rubber) and concentration. Fracture mechanisms were also identified.

scholarly journals Fabrication and characterization of composite materials based on porous ceramic preform infiltrated by elastomer

2015 ◽  
Vol 63 (1) ◽  
pp. 193-199 ◽  
Author(s):  
P. Chabera ◽  
A. Boczkowska ◽  
A. Witek ◽  
A. Oziębło
Keyword(s):  
Volume Fraction ◽  
Split Hopkinson Pressure Bar ◽  
Porous Ceramic ◽  
Strain Curve ◽  
Sem Images ◽  
Static Compression ◽  
Pressure Infiltration ◽  
Fabrication And Characterization ◽  
Elastomer Composites

Abstract The paper presents the experimental results of fabrication and characterization of ceramic- elastomer composites. They were obtained using pressure infiltration of porous ceramics by elastomer As a result the composites in which two phases are interpenetrating three-dimensionally and topologically throughout the microstructure were obtained. In order to enhance mechanical properties of preforms a high isostatic pressure method was utilized. The obtained ceramic preforms with porosity gradient within the range of 20-40% as well as composites were characterized by X-ray tomography. The effect of volume fraction of pores on residual porosity of composites was examined. These results are in accordance with SEM images which show the microstructure of composites without any delaminations and voids. Such composites exhibit a high initial strength with the ability to sustain large deformations due to combining the ceramic stiffness and rubbery elasticity of elastomer. Static compression tests for the obtained composites were carried out and the energy dissipated during compression was calculated as the area under the stress-strain curve. The dynamic behavior of the composite was investigated using the split Hopkinson pressure bar technique. It was found that ceramic-elastomer composites effectively dissipate the energy. Moreover, a ballistic test was carried out using armor piercing bullets.

Preparation of Graphene and Graphene/Al Composites

2015 ◽  
Vol 816 ◽  
pp. 177-181 ◽  
Author(s):  
Jin Feng Leng ◽  
Xin Ying Teng ◽  
Fu Lei Jiang ◽  
De Jiang Hu ◽  
Hao Ran Geng
Keyword(s):  
Volume Fraction ◽  
Matrix Composites ◽  
Photoelectric Device ◽  
Chemical Plating ◽  
Aerospace Structure ◽  
Energy Storage Material ◽  
Surface Modified ◽  
Morphology Characterization ◽  
Fabrication Parameters

Metal matrix composites reinforced by graphene particles exhibit physical and mechanical property and are developed and qualified for use in aerospace structure, bioengineering, energy storage material and photoelectric device. In the present paper, graphene was fabricated by modify Hummers method, and then was surface modified by chemical plating copper. The graphene/Al composites were fabricated by powder metallurgic method. Morphology characterization of graphene and composites were detected by XRD and SEM,the fabrication parameters of composites were optimized by testing harness and density. The volume fraction of graphene particles was 3%, the density of composites was maximum of 96.5%. The hardness had a maximum of HB 42.6, and the hardness of graphene/Al composites increased by 33.5%.

scholarly journals Transport Characteristics of Fujifilm Ion-Exchange Membranes as Compared to Homogeneous Membranes АМХ and СМХ and to Heterogeneous Membranes MK-40 and MA-41

Membranes ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 84 ◽  
Author(s):  
Sarapulova ◽  
Shkorkina ◽  
Mareev ◽  
Pismenskaya ◽  
Kononenko ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Volume Fraction ◽  
Transport Numbers ◽  
Type I ◽  
Type Ii ◽  
Ion Exchange Membranes ◽  
Electrospinning Method ◽  
Microheterogeneous Model ◽  
First Time

Ion-exchange membranes (IEMs) find more and more applications; the success of an application depends on the properties of the membranes selected for its realization. For the first time, the results of a comprehensive characterization of the transport properties of IEMs from three manufactures (Astom, Japan; Shchekinoazot, Russia; and Fujifilm, The Netherlands) are reported. Our own and literature data are presented and analyzed using the microheterogeneous model. Homogeneous Neosepta AMX and CMX (Astom), heterogeneous MA-41 and MK-40 (Shchekinoazot), and AEM Type-I, AEM Type-II, AEM Type-X, as well as CEM Type-I, CEM Type-II, and CEM Type-X produced by the electrospinning method (Fujifim) were studied. The concentration dependencies of the conductivity, diffusion permeability, as well as the real and apparent ion transport numbers in these membranes were measured. The counterion transport number characterizing the membrane permselectivity increases in the following order: CEM Type-I MA-41 < AEM Type-I < MK-40<CMX CEM Type-II CEM Type-X AEM Type-II < AMX < AEM Type-X. It is shown that the properties of the AEM Type-I and CEM Type-I membranes are close to those of the heterogeneous MA-41 and MK-40 membranes, while the properties of Fujifilm Type-II and Type-X membranes are close to those of the homogeneous AMX and CMX membranes. This difference is related to the fact that the Type-I membranes have a relatively high parameter f2, the volume fraction of the electroneutral solution filling the intergel spaces. This high value is apparently due to the open-ended pores, formed by the reinforcing fabric filaments of the Type-I membranes, which protrude above the surface of these membranes.

scholarly journals In Situ Formation of ZrB2 and Its Influence on Wear and Mechanical Properties of ADC12 Alloy Mixed Matrix Composites

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2141
Author(s):  
Lalta Prasad ◽  
Niteesh Kumar ◽  
Anshul Yadav ◽  
Anil Kumar ◽  
Virendra Kumar ◽  
...  
Keyword(s):  
Xrd Analysis ◽  
Inorganic Salts ◽  
Dry Sliding ◽  
Matrix Composites ◽  
Mixed Matrix ◽  
Sem Images ◽  
Mechanical And Tribological Properties ◽  
In Situ Formation

In this work, aluminium alloy ADC12 reinforced with various amounts of ZrB2 (0 wt.%, 3 wt.%, 6 wt.%, 9 wt.%) were synthesized by an in-situ reaction of molten aluminium with inorganic salts K2ZrF6 & KBF4. XRD, EDAX, and SEM techniques are used for the characterization of the fabricated composite. XRD analysis revealed the successful in situ formation of ZrB2 in the composite. From the SEM images, it was concluded that the distribution of reinforcement was homogeneous in the composites. A study of mechanical and tribological properties under the dry sliding condition of ZrB2-reinforced ADC12 alloy has also been carried out. It is seen that there is an increase in tensile strength by 18.8%, hardness by 64.2%, and an increase in wear resistance of the material after reinforcement. The ductility of the material decreased considerably with an increase in the amount of reinforcement. The composite’s impact strength decreased by 27.7% because of the addition of hard ZrB2 particulates.

INVESTIGATION OF MECHANICAL AND CORROSION PROPERTIES OF AA2024–B4C–TiC HYBRID METAL MATRIX COMPOSITES

2018 ◽  
Vol 25 (05) ◽  
pp. 1850109
Author(s):  
SARAVANAN MUTHUSAMY ◽  
GANESAN PANDI
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Volume Fraction ◽  
Matrix Alloy ◽  
Reinforcement Particle ◽  
Matrix Composites ◽  
Sem Images ◽  
Corrosion Properties ◽  
Volume Percentage ◽  
Mechanical And Corrosion Properties

Metal matrix composites are widely applied in the automotive and aircraft structural components. This work investigates the influence of mechanical and corrosion properties hybrid aluminium 2024 metal matrix composites having 5%, 10%, 15% and 20% of TiC and B4C (equal amount) reinforcement compositions. The increase in volume fraction of B4C and TiC particle in matrix alloy increases the hardness, yield strength, ultimate strength and decreases the ductility of the composite. SEM images show microstructure of the composites with particles having a different volume percentage of reinforcement. The uniform distribution of B4C and TiC particles is most predominant in composite fabrication and the reinforcement particle additions have proved improved corrosion resistance in AA2024–B4C–TiC MMCs.

scholarly journals Development, Testing and Characterization of Al NanoTiCp Composites through Powder Metallurgy Techniques

2021 ◽  
Vol 5 (8) ◽  
pp. 224
Author(s):  
Gaurav Bajpai ◽  
Anuradha Tiwari ◽  
Rajesh Purohit ◽  
Vijay Panchore ◽  
Rashmi Dwivedi ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Matrix Composites ◽  
Micro Hardness ◽  
Compaction Process ◽  
Sem Images ◽  
Nano Composite ◽  
Industrial Sectors ◽  
Isostatic Compaction ◽  
Indirect Tensile

In the present scenario, weight diminution and strength enrichment are the main requirements for escalating the application of a nano composite material in different sectors. Several industrial sectors, such as automobile, defense and aerospace, are making various components of nano composites with the help of powder metallurgy processing. In this study, Al nanoTiCp composites (2, 4 and 6 wt %) were contrived through modified powder metallurgy (PM) techniques with the help of Cold Isostatic Compaction process (CIP). The mechanical properties such as density, porosity, micro-hardness, compressive strength and indirect tensile strength were increasing with the reinforcement of nanoTiCp particles up to 4 wt % in Al metal matrix composites. Nevertheless, clustering of nanoTiCp particles were found at 6 wt %, which is also observed in SEM images.

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